Home / 138,776.72-191,515.41-85,091.34

Finding the Fourth Proportional to 138,776.72, 191,515.41 and 85,091.34

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Solution

The fourth proportional to 138,776.72, 191,515.41 and 85,091.34 is: 117,428.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,776.72 : 191,515.41 = 85,091.34 : x
  2. Step 2: Convert to fraction form
    138,776.72/191,515.41 = 85,091.34/x
  3. Step 3: Cross multiply
    138,776.72x = 191,515.41 × 85,091.34
  4. Step 4: Simplify right side
    138,776.72x = 16,296,302,867.55
  5. Step 5: Solve for x
    x = 16,296,302,867.55/138,776.72
  6. Step 6: Final answer
    x = 117,428.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.